Leon beat him here:http://cgi.ebay.com/1911-D310-PACIFIC-COAST-BISCUIT-STINSON-SGC-80-6-1-1_W0QQitemZ190254399277QQcmdZViewItem?hash=item190 254399277&_trkparms=39%3A1|66%3A2|65%3A3|240%3A1318&_trksid=p3286.c0.m14>And in case you want to beat him here is the elaborate formula: